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Formaldehyde-free preparation method of nitrogen-oxygen co-doped carbon-based supercapacitor electrode material

A technology for supercapacitors and electrode materials, which is applied in the fields of hybrid capacitor electrodes, carbon preparation/purification, hybrid/electric double-layer capacitor manufacturing, etc. Increased rate and effect, increased effect of porous structure

Active Publication Date: 2021-10-22
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Different heteroatom doping has obvious differences in improving the physicochemical properties and capacitance performance of carbon materials

Method used

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  • Formaldehyde-free preparation method of nitrogen-oxygen co-doped carbon-based supercapacitor electrode material
  • Formaldehyde-free preparation method of nitrogen-oxygen co-doped carbon-based supercapacitor electrode material
  • Formaldehyde-free preparation method of nitrogen-oxygen co-doped carbon-based supercapacitor electrode material

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Experimental program
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Embodiment 1

[0030] Example 1: A non-formaldehyde-free preparation method of a nitrogen-oxygen co-doped carbon-based supercapacitor electrode material

[0031] A method for preparing a nitrogen-oxygen co-doped carbon-based supercapacitor electrode material without formaldehyde, comprising the following steps:

[0032] Step 1: Mix melamine, D-glucose anhydrous, sodium bicarbonate and magnesium hydroxide, put them into a resonant sound mixing device, and process them for 12 minutes at a frequency of 100 Hz and an amplitude of 1.5 mm to obtain mixed reaction raw materials; Weigh 1.5 grams of D-glucose anhydrous, 1.5 grams of melamine, and 3.0 grams of sodium bicarbonate.

[0033] Step 2: Mix the mixed reaction raw materials obtained in step 1 with deionized water according to the mass ratio, stir evenly, and perform ultrasonic treatment for 20 minutes; the volume of deionized water is 100 mL

[0034] Step 3: Place the aqueous solution obtained in step 2 into a heating device with a steam con...

Embodiment 2-6

[0043] Example 2-6: A non-formaldehyde-free preparation method of a nitrogen-oxygen co-doped carbon-based supercapacitor electrode material

[0044] Weigh 5 groups of raw materials respectively:

Embodiment 2

[0045] Embodiment 2: 1.5 grams of D-glucose anhydrous, 1.5 grams of melamine, and 3.0 grams of sodium bicarbonate.

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Abstract

The invention provides a non-formaldehyde-free preparation method of nitrogen and oxygen co-doped carbon-based supercapacitor electrode materials, using melamine (nitrogen source), D-anhydrous glucose (carbon source), sodium bicarbonate (porogen), Magnesium hydroxide (pore-enlarging agent) is used as raw material, and it is processed by resonance acoustic mixing, microwave-assisted solvent evaporation reaction, steam explosion treatment of resin, high-temperature anaerobic carbonization, micronized ball milling with nitrogen gas, cleaning and vacuum drying, etc., to obtain nitrogen-oxygen co- Doped carbon-based supercapacitor electrode materials. The specific surface area of ​​nitrogen and oxygen co-doped carbon-based supercapacitor electrode materials can reach 700-800m 2 / g, the specific capacitance can reach 160‑170F / g (the current density is 1 A / g).

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and relates to a method for preparing an electrode material of a nitrogen-oxygen co-doped carbon-based supercapacitor without formaldehyde. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are widely used in energy storage devices to replace batteries and fuel cells due to their fast charge-discharge speed, long cycle life and high power density. According to the different energy storage mechanisms, supercapacitors can be divided into three categories. Electric Double-Layer Capacitor (EDLC): Stores electrical energy through the double-layer effect, which occurs at the interface between a conductive electrode and an adjacent liquid electrolyte. Electrochemical pseudocapacitor: its energy storage mechanism is completely different from that of an electric double layer capacitor. The electrode material of a pseudocapacitor stores and releases energy th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/34H01G11/86C01B32/05
CPCC01B32/05H01G11/34H01G11/86Y02E60/13
Inventor 张忠洁万彭陈鹏鹏吴明元
Owner ANHUI UNIVERSITY
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